"It puzzles me," David went on. "I can't see my way out of the puzzle; only I am sure there is wrong somewhere."
"And it must be right for each of us to do all he can to help," said Matilda.
David shook his head. "One goes very little way."
"But that is all we can do. And if every one would—"
"Every one will not, Tilly; there it is."
"No. I know it; but still, David, people have to do so."
"So how?"
"Why, each one by himself, I mean."
"Well," said David, smiling, "that's safe for you. I mean to study the subject."